Use of Polyether Polyol

Polyether polyol is abbreviated as polyether. It is an oligomer whose main chain contains ether bond (—R—O—R—) and the terminal group or side group contains more than 2 hydroxyl groups (—OH). It is prepared by addition polymerization of an initiator (a compound containing an active hydrogen group) with ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO), etc. in the presence of a catalyst. The largest polyether producers are all common polyether polyols. Polyether polyols are produced with glycerol (glycerol) as the initiator and epoxide, by changing the PO and EO addition methods (mixed addition or separate addition), addition ratio, addition order and other conditions.

The main purpose

1. Detergent or defoamer

L61, L64, F68 are used to prepare low-foam, high detergency synthetic detergent;

L61 and L81 are used as defoamers in the papermaking or fermentation industry;

F68 is used as an antifoaming agent in the blood circulation of artificial heart-lung machine to prevent air from entering.

2. Excipients and emulsifiers

Polyether has very low toxicity and is often used as a pharmaceutical excipient and emulsifier; it is often used in the oral cavity, nasal sprays, eyes, ear drops and shampoos.

3. Wetting agent

Polyether is an effective wetting agent and can be used in acid baths for fabric dyeing, photographic development and electroplating. F68 is used in sugar factories. Due to the increased water permeability, more sugar can be obtained.

4. Antistatic agent

Polyether is a useful antistatic agent, and L44 can provide long-lasting static protection for synthetic fibers.

5. Dispersant

Polyether is used as a dispersant in emulsion paints. F68 acts as an emulsifier during the emulsion polymerization of vinyl acetate. L62 and L64 can be used as pesticide emulsifier, as coolant and lubricant in metal cutting and grinding, and as lubricant during rubber vulcanization.

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Polyether Polyol Manufacturing ProcessPolyether Polyol Manufacturing Process

Synthesis of DMC-based polyether polyol by a continuous method A certain amount of DMC catalyst is taken and uniformly dispersed in a certain amount of small molecule initiator. Add 0.5 kg of the mixture of the initiator in the small test reactor. The vacuum was replaced 1-2 times with N2, and the N2 pressure was maintained at 0.1 MPa. After heating, stirring and raising the temperature to a certain temperature, the quantitative PO was introduced into the continuous autoclave with nitrogen gas for induction. When the induction is successful (the temperature in the kettle rises and the pressure drops), the PO is continuously passed to carry out the reaction. Open the outer loop and continue to pass the PO into the continuous kettle. When the liquid in the reaction vessel is full, the PO, DMC catalyst and the initiator are continuously added to the kettle at a certain ratio and a certain speed through the power system. Continuous discharge is started when a certain pressure is reac

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